Decanter spout named after the Italian physicist Giovanni B. Venturi (1746-1822), who invented this principle. The tube, about ten centimetres long, is made of plastic and stainless steel and has a tight-fitting rubber stopper. An hourglass-like constriction increases the flow speed and creates a vacuum that sucks air into the tube. A sieve with holes of different sizes splits the wine and additionally aerates it. The wine remaining in the bottle does not come into contact with the added oxygen. According to the manufacturer, this principle replaces a decanting vessel with hours of decanting. Brand systems that function according to a similar principle are Decantus and Versovino.